//定义变量/对象/常量/函数
//定义sum函数时直接导出 export
export const sum = function(a, c) {
    return parseInt(a) + parseInt(c);
}

const sub = function(a, b) {
    return parseInt(a) - parseInt(b);
}

let name = "lmy";

const PI = 3.14;

let monster = {
    name:"牛魔王",
    age:500,
    hi() {
        console.log("你好，牛魔王");
    }
}
